Convert NSARRAY to NSDictionary to be used as a result of JSon serialisation swift4 Xcode 9

Question

I want to convert a NSArray to a NSDictionary and thereafter choose the keys and the values in the NSDictionary to be able to later on add the data from the NSDictionary to a object by using the keys in it.

How can I do this in the smartest way?

Here's what I have so far:

func makeCall(completion: result: NSDictionary or Dictionary){
    let json = try JSONSerialization.jsonObject(with: data!, options:  JSONSerialization.ReadingOptions(rawValue: 0)) as? NSDictionary
    let json = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? Array<Any>
}

The two JSON files look nearly the same. The difference is the var type so you will get keys and values but in an array style. We need it in a dictionary style to get the values by their keys.

Answer 1

Swift 4

In Swift you should rather use Dictionary, and only use NSDictionary if you explicitly need that type.

    //your NSArray
    let myArray: NSArray = ["item1","item2","item3"]

    //initialize an emtpy dictionaty
    var myDictionary = [String:String]()

    //iterate through the array
    for item in myArray
    {
        //add array items to dictionary as key with any value you prefer
        myDictionary.updateValue("some value", forKey: item as! String)
    }

    //now you can use myDictionary as Dictionary
    print ("my dictionary: ")
    print (myDictionary)

    //if you prefer to use it as an NSDictionary
    let myNSDictionary = myDictionary as NSDictionary!
    print ("my NSDictionary: ")
    print (myNSDictionary)